Continuous centrifugal drier.



W.'F. DOWNING, JR. & C. L. WEIL.

CONTINUOUS CENTRIFUGAL DRIER.

APPLICATION FILED JUNE 22.19:].

1,259,727. Patented Mar. 19, 1918.

2 SHEETS-SHEET I.

awuentozs 2x51, WW mm x/mzaw WILLIAM FRANKLIN DOWNING, J3, OF ST.

CLAIR, HURON, MICHIGAN ASSIGNORS T0 DIAMOND CRYSTAL SALT COMPANY, OF ST. CLAIR, MICHIGAN, A CORPORATION OF MICHIGAN.

AND CHARLES LEWIS WEIL, OFPOB'E CONTINUOUS CENTBIFUGAL DRIER.

Specification of Letters Batent.

Patented Mar. 19, 918.

Application filed June 22, 1917. Serial No. 176,422.

ugal Driers, of which the following is a specification, reference being had therein to the accompanying drawings. i

The invention relates to centrifugal driers such as are employed'in the drying of salt and similar materials, and it is the object of the invention to obtain a construction in which the material may be continuously f in and out of the centrifugal without mterrupting the rotation thereof.

Inthe drawings:

Figure 1 is a vertical central section through the device;

Fig. 2 is a horizontal section on line 2-2 Fig. 1;

Fig. 3 is an enlarged section showing the differential drive for the feeding mechanism;

Fig. 4 is an elevation at right angles to Fig. 3.

A is the revoluble drum, which is formed of suitable material for permitting the passage of liquid therethrough while retaining the salt material. This drum is =mounte upon a central shaft B by means of heads C, the lowermost of which 15 fast upon said shaft, said shaft being preferably suspended from a spherical bearing D which permits it and the drumto rotate around the true center of gravity. E is a pulle for mparting rotary motion to the sha t B. The upper portion of this shaft is hollow and is connected with a conduit F for introducing material into the drum, said material passin downward through the hollow shaft and being discharged through lateral openings G therein at the upper end of the drum. 7

With the construction as thus far described, it would be possible .to ntroduce the salt orother material to be dr1ed while the drum is ra idly revolving, but on account of the lac ity of the mater al of fluid it would not of i feed downward and CHARLES L. WEIL, both citizens through the drum but would lodge in the upper portion thereof. It is therefore .essential to provide a positive feeding mechaw' nism for passing the material longitudinally through the drum and .finall discharging the same at the lower end. %his we have provided for by mechanism of the following construction H is scraper or within the drum, which as shown is in the form of a worm or spiral mounted u on a sleeve I engaging a shaft B. J is the tu ular dr1v1ng member for the worm which has an enlarged portion J apertures G and peripherally perforated for the passage of the material therethrough.

K is an enlargement in the member J out side of the drum, in which is arranged a differential or planetary gearing. As specifically shown, this gearing comprises an in ternal gear-wh l L keyed or otherwise rotatively connected with the shaft B, an internal gear-wheel M of different diameter connected to the casing K and a rotary member N journaled on an eccentric bearing havin an external gear-wheel P in mesh with t e internal gear-wheel L and an external gear-wheel Q in mesh with the internal gear-wheel M. The eccentric bearing 0 is ormed upon a member R which is sleeved upon the shaft B and is held from rotation. Inasmuch, however as the shaft B is suspended from the sp erical bearing D and is free to oscillate so as to rotate about its true center of gravity, it is necessary to provide for this movement in the anchorage connecfeeding member arrangedv in the plane of the tion of the member R. Thus, as shown, the

rovided with a flange S havotted ears T projecting therefrom and connected by pins U with vertical slotted ears V on the stationary f bearing member W The cars T are spaced from each other so as to emit movement of the ears V lon itudina ly of the pm U, and springs X s eved upon sa 1d pins serve yieldably hold the parts 1n normal pos head C of the drum is journaled u on the member J intermediate and K of said member B. is ing laterally s tees -With the construction just described when the shaft B is revolving a planetary movement. will be imparted to the member N 'due to the'difierentialdiameters of the pairs of mtermeshing speed of rotation ear-wheels L P and M Q. e casing K at a different than that of the shaft B .andthrough the medium of the member J will impart this movement to the sleeve I andworm H. Thus the drummay be re- This'will drive t volved at high velocity while the rotation of thefeeding worm-1s comparatively slow. Al s-the perlphery of this worm is in close proximity tothe inner face of the drum the the construction as described the o f rupting the rotation of the drum, which has obvious advantages over the intermittent operation now commonly used. Further- "shaft to rotate about, the

more this feeding movement is imparted, withoutinterfering in any way with the freedom of the drum and its suspension true center of t What we claim as our invention is:

- g r. L The combination with acentrifu'gal drum, of a driving shaft for revolv' v j truejqsnter of gravit" material .1nto the dr means for driving said feedin 40' tstr uecenter of; gravity.

I trodiicingffmatenal '46 no for v 4 for advancing the, material t 'inits- E he pomt of g pennit'ting the rotation thereof-1.- about its true centered gfl Y yi n I f i t v 'm' man-n1 i to; onefend ofv sa d mountedwithin, the

e and suspending the same, free to rotate about its the up er ortion of said fshaftheing ho ow for t e ceding of I 11m, mechanism :mountedYw-ithinjdhe drum for positively feeding the material therethrough, and

v mechanism, permitting free. rotation ofsai drum about continuously means for ininto 'one end of said mechanically operated feedin mech-- h point of introduction, to I rge, and means for driv-' ing jeaidgfeeding mechanism permitting of therotafi9n2of1said drum about its true oenter ofgravi 2. Thefcombination w th a mati gpe anugn drum; of

4 a; The emails-ano an. acentrifugal; n1 drum drumigof means for; ndingfsaid, drum' vo !l s t i'a ia ns g' the ma -a1 there-e. t ras d flfl smlal smmh said mechanicalfeeding means nbou'fitscentercfgravity; wi h a aeemer mmnfthem to qtate -"ff r-in c ns m i n one end of saidr r r-moua tedonsaidshaft-lfl drum, of means for suspending said drum permitting it to rotate about its true center of gravity, mechanism mounted within the drum for mechanically feeding material therethrough, and a differential gearing connecting said mechanism with said drum to produce a differential rotation thereof.

5. The combination with a centrifugal drum of a driving shaft for revolving and suspending the same, free to rotate about its true center of gravity, the upper ortion of said shaft being hollow for the eeding of the material into the drum, mechanism mounted within the drum for positively feeding the material therethrou h, a differential gearing mounted onfsai shaft and forming a driving connection betweenthe same and the mechanism within the drum, n

and an anchorage for said differential gearlng permitting the free turning of'the shaft in balanced rotation about its center of the feeding of the material to the drum, a I

worm scraper mounted on said shaft within the drum and adapted to mechanically feed the material therethrou h, and means for diiferentially rotating said scraper comprisa differential gearing mounted upon said shaft and forming a connection inter= mediate the same and said worm and an anchorage for said differential gearing having an articulatedconnection therewithpermitting the. free oscillation of the shaft andholding one member of said gearing from rotation.

7; The combination with acentrifugal drum, ofa driving shaft for'revolving and suspendingtlie samefree to rotate about its e center of gravity, means for introducingj material into one end of said drum, mechanism-mounted within the drum for positively-feeding the material therethrough ajdiiferential-gearin mounted. upon said shaft, and forming a riving connection between the same and the mechanism within 'e ',and an anchorage for said difiers entialgeari permitting the free turning of'theshaft 111. balanced rotation about its center of gravity.

drum,'fof a'shaft' formm 'a', and

' nsion means for-'sjaid and having a -p votal, permittm oscillation. to rotate-aboutthetrue center gravity, means awomma e' 4 I thedruman adaptedtomechanically- 8. Thecombmation with' a centrifugal.

meager feed the material therethrough, and means for differentially rotating sai scraper comprisin a differential gearing mountedupon said s aft and forming a connection inter- 5 mediate the same and said worm, and an anchorage for said difierential gearin having an articulated connection therewit perholding one member of rotation.

said gearing from In testimony whereof we afix our signatures.

WILLIAM FRANKLIN DOWNING, JR.

LEWIS WEIL. 

